Home / 20,728.90-28,606.26-11,776.24

Finding the Fourth Proportional to 20,728.90, 28,606.26 and 11,776.24

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Solution

The fourth proportional to 20,728.90, 28,606.26 and 11,776.24 is: 16,251.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.90 : 28,606.26 = 11,776.24 : x
  2. Step 2: Convert to fraction form
    20,728.90/28,606.26 = 11,776.24/x
  3. Step 3: Cross multiply
    20,728.90x = 28,606.26 × 11,776.24
  4. Step 4: Simplify right side
    20,728.90x = 336,874,183.26
  5. Step 5: Solve for x
    x = 336,874,183.26/20,728.90
  6. Step 6: Final answer
    x = 16,251.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.